Diamond or gemstone, particularly the bottom part or pavilion of a cut diamond or gemstone



FIG. 1 is a bottom planar view of a diamond or a gemstone showing my new design;

FIG. 2 is a perspective view thereof with the bottom part in front;

FIG. 3 is a top planar view thereof; and,

FIG. 4 is a side planar.

It being understood that the broken lines are for exemplary illustrative purposes only and form no part of the claimed design. 

The ornamental partial design for a diamond or gemstone, particularly the bottom part or pavilion of a cut diamond or gemstone, as shown. 